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In my daily life as a programmer I come across problems. This blog, is where I record them (and more importantly their solutions) so that I can dig them out in the future. I hope it might save others some problem solving time too.

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A nice, and reasonably easy feature to get a handle on in Vim is key mapping. You can map a key combination to another key combination. In order to comment a line with // at the beginning of the line we would type the following commands in vim:

0 - move to beginning of the line
i - insert mode
// - the comment syntax
<esc>- back to normal mode
j - move down to the next line

so we can map that series of comands in to an easy to remember key combination like this:

:nmap cc 0i//<esc>j

This works great for one line, but what about where you want to comment out multiple lines you ask? It's a pretty reasonable request!

Well, if we simply right 2cc, the 2 will be appended to the 0, which will be equivalent to typing 20i//j, which is not what we want. Try it!

The solution is to use a concept called register, which will define the command as a block, prevent the appending we say previously. It will look like the following